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Bike Pump Gun

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Unread postAuthor: Kenny_McCormic » Sat Feb 24, 2007 10:39 am

brakline could probably hold it as its make for hydraulics which go to very high pressures i dont know how high a brake system goes. yellow brass is rated to 1500 psi iirc i have no idea on copper depend on what kind of copper at least 300psi
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Unread postAuthor: Hotwired » Sat Feb 24, 2007 11:35 am

Eh... copper tubing that small can take well over 1000psi.
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Unread postAuthor: noname » Sat Feb 24, 2007 10:12 pm

I doubt it. I wouldn't trust copper to pressure that high, and definately not brakeline, considering it's wall thickness is .016."
Oops, second page. Hotwired probably knows more than I do about copper, I find it too expensive to be of any use to me.
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Unread postAuthor: SniperMan » Tue Mar 13, 2007 6:17 pm

My bb runs @ 80psi with 5mm bb's. The Barrel is about 60cm long and with about 800cc tank i get 100m/s. Mine is a little different than a normal single shot as it has multiple valves etc and can only be used on compressed air.

That sort of volume is what i would call 'pumpable' however. If you want to run lower pressure for the same velocity you need a longer barrel and more air to give it time to accellerate the bb.
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